Unwanted decimals in Logic Tempo Track

It looks like I might have solved my problem. Hopefully it will last. I clicked on the tempo track with the cursor while holding "control" and I got a round number. And now I don't have to hold control and everything works normally! I probably had something activated that needed to be deactivated. If someone knows more about this issue, I would love to understand what happened. Thanks in advance!

Thanks Erik. Actually, in the version I have (Logic 10.4.4), I can enter it manually by holding Control/Alt/Command. Yesterday I went to the tempo list and entered a round number for that node and for now when I move it up or down with the cursor in the tempo track, I get round numbers. Maybe I would have got the same result by entering it manually in the tempo track like you suggest. I can't imagine having to do that each time I create a tempo change in the tempo track. Why can't it be round numbers by default like it was in Logic 9? That doesn't make sense. There should be a place in the Preferences where I can ask Logic to not give decimals when adjusting a node. Or maybe it's a bug?

Thank you DaCaptain. Actually, the button I used was not Control, as I wrote in my question, but Alt. After reading your answer, I searched the internet for "Logic control modifier"and all I could find was info in Logic Pro support about the Mackie control surface and how its ALT button can be used to fine-tune, independently of the keyboard's ALT button (interesting). I tried searching for "logic automation fine-tuning" and I only found things about fine-tuning faders and volume pan. Do you know where I could read in details about the Control Modifier in Logic?

It's doing it again. I am moving the cursor up and down on a nod that I just created in the tempo track, and I cannot get a round number. I want to go to 160 and I keep getting numbers with the .1 decimal: 160.1, 150.1, 170.1 etc.

I tried holding Alt, Command, Control, Shift, and different combinations of those buttons, to no avail. What's happening? Going nuts!