C++ adding a positive float to a negative value in an FVector is decreasing instead of increasing it

[droppedmartin03]

as the title says, this is happening when adding 50 to a negative number, its variable but around -1000 to -100. here are some code snippets, sorry i don’t know how to format them correctly as this is my first time posting!

	FVector startPoint;
	FVector endPointX;
	FVector endPointY;
	float cellSize;
	FVector Center = FVector(startPoint.X + (cellSize / 2), startPoint.Y + (cellSize / 2), startPoint.Z + (cellSize / 2));
	GridCanContain contains;

};```
```ANavGraph::GridSquare ANavGraph::CreateSquare(FVector start, FVector endX, FVector endY, float cellSize)
{
	GridSquare square;
	square.startPoint = start;
	square.endPointX = endX;
	square.endPointY = endY;
	square.cellSize = cellSize;
	square.contains = SquareContains(square.Center, cellSize);
	return square;
}```
```FVector gridStart = GetActorLocation();
*GetActorLocation().ToString(), baseX, baseY);
FVector start = FVector(gridStart.X + baseX, gridStart.Y + baseY, gridStart.Z + baseZ);
FVector endX = FVector(start.X + tileSize, start.Y, start.Z);
FVector endY = FVector(start.X, start.Y + tileSize, start.Z);
Grid[height][column][row] = CreateSquare(start, endX, endY, tileSize);
baseX += tileSize;```

[droppedmartin03]

for anyone wondering, for some reason doing math in a header file struct that is not in a constructer, i.e. float 5 = -2 + 4, will be wrong and give you -6. do it in a constructer and it works