Regions heights unexpectedly change (v1.7.4)

Using a fresh install of v1.7.4
Log into the CMS web interface as a user.
Create a new layout.
For the default initial region, go into its Region Options and set top 0; left 0; width 960; height 100.
Add a 2nd region. Go into its Region Options and set top 0; left 960; width 960; height 100.
Add a 3rd region. Go into its Region Options and set top 100; left 0; width 960; height 880.
Add a 4th region. Drag it towards the lower right corner. Click Save Position.
Go into this fourth region’s Region Options and set top 100; left 960; width 960; height 880.

Back at the Layout Design view, notice the first three region’s heights have all increased by 1.
Region 1 & 2 are now 101 instead of 100, and region 3 is now 881 instead of 880.

Hi,

Yeah it is true, I was able to recreate it in our test CMS, if you would drop this step: ‘Drag it towards the lower right corner. Click Save Position.’ then it would be fine, not that +1 to height/width is terrible and you can edit them again then it will also be fine.

That being said, thank you for your report, we always appreciate it.