SDL scrolling scrolling inconsistently

So I'm working on updating my previous project (which I posted here to view the code), this time implementing a repeating background (like the one used in cartoons) so the SDL doesn't need to load really big images for the level. There's a strange inconsistency in the program: the first time the user scrolls all the way to the right, 2 fewer panels are displayed than indicated. Backtrack (left) displays the correct number of panels (i.e. panels repeat the number of times specified in the code). After that, it seems like it goes again (once from left to right) the correct number of panels is displayed, and the other is backward. Here's some selected code and here . Zip all my code

Constructor:

Game::Game(SDL_Event* event, SDL_Surface* scr, int level_w, int w, int h, int bpp) {
    this->event = event;
    this->bpp = bpp;
    level_width = level_w;
    screen = scr;
    w_width = w;
    w_height = h;

    //load images and set rects
    background = format_surface("background.jpg");
    person = format_surface("person.png");

    background_rect_left = background->clip_rect;
    background_rect_right = background->clip_rect;
    current_background_piece = 1; //we are displaying the first clip
    rect_in_view = &background_rect_right;
    other_rect = &background_rect_left;

    person_rect = person->clip_rect;

    background_rect_left.x = 0; background_rect_left.y = 0;
    background_rect_right.x = background->w; background_rect_right.y = 0;
    person_rect.y = background_rect_left.h - person_rect.h;
    person_rect.x = 0;
}

      

        
        
        
      

    

and here's the move method that is probably causing all the problems:

void Game::move(SDLKey direction) {
if(direction == SDLK_RIGHT) {
    if(move_screen(direction)) {
        if(!background_reached_right()) {
            //move background right

            background_rect_left.x += movement_increment;
            background_rect_right.x += movement_increment;

            if(rect_in_view->x >= 0) {
                //move the other rect in to fill the empty space
                SDL_Rect* temp;

                other_rect->x = -w_width + rect_in_view->x;

                temp = rect_in_view;
                rect_in_view = other_rect;
                other_rect = temp;

                current_background_piece++;
                std::cout << current_background_piece << std::endl;
            }

            if(background_overshoots_right()) {
                //sees if this next blit is past the surface
                //this is used only for re-aligning the rects when 
                //the end of the screen is reached

                background_rect_left.x = 0;
                background_rect_right.x = w_width;
            }
        }
    }
    else {
        //move the person instead

        person_rect.x += movement_increment;
        if(get_person_right_side() > w_width) {
            //person went too far right

            person_rect.x = w_width - person_rect.w;
        }
    }
}

else if(direction == SDLK_LEFT) {
    if(move_screen(direction)) {
        if(!background_reached_left()) {
            //moves background left

            background_rect_left.x -= movement_increment;
            background_rect_right.x -= movement_increment;

            if(rect_in_view->x <= -w_width) {
                //swap the rect in view
                SDL_Rect* temp;

                rect_in_view->x = w_width;

                temp = rect_in_view;
                rect_in_view = other_rect;
                other_rect = temp;

                current_background_piece--;
                std::cout << current_background_piece << std::endl;
            }

            if(background_overshoots_left()) {
                background_rect_left.x = 0;
                background_rect_right.x = w_width;
            }
        }
    }
    else {
        //move the person instead

        person_rect.x -= movement_increment;
        if(person_rect.x < 0) {
            //person went too far left

            person_rect.x = 0;
        }
    }
}
}

      

        
        
        
      

    

without the rest of the code, it doesn't make much sense. Since this is too much, I'll upload it here for testing. Anyway, does anyone know how I can fix this inconsistency?