I have a RouterBoard 532 that I just upgraded from 4.something to 5.5. Checking the firmware level, it says:
current-firmware: 2.5
upgrade-firmware: 2.18
It said the same thing before I upgraded it, too. I thought the upgrade-firmware was expected to be equal to or higher than the current-firmware. I don’t know how to get firmware newer than what is in 5.5, so I have no idea how it got in this state. Am I supposed to do something to correct it?
i think still 5 < 18 so bootloader version is not backward.
http://wiki.mikrotik.com/wiki/Manual:Bootloader_upgrade
OMG, my brain now collates in ASCII.
I haven’t felt quite this stupid since 1973, when my odometer was coming up on 77775 and I nudged my wife and said, “Watch – the mileage is about to roll over.”
Yes, but .5 is definitely higher than .18
What did you drink last night? 
Yes, but .5 is definitely higher than .18
no it isn’t. who said those are decimals? forgotten how to count already 
age is getting to you.
hmm, ok. I see you’re right. My mistake.
it should be 2.05 so we could understand it right away.
The current numbering is pretty much standard in the software development world.
.
It isn’t decimal numbering. The ‘.’ is a separator between version numbers. Take a look at some Linux packages you’ll see versions like 2.32.3 and such.