Upgrade not taking effect

Just bought cheaper infantries, and even though I've played 2 games, as well as logged out and in twice since then, it hasn't taken effect.
In-game, my infantries cost 60 with PD strat on, when they should be 50. And its not just a display bug, on purchasing one, 60 cost was deducted from my starting fund.
However, checking the units menu shows this: as it should be.
I've never had this problem with any other upgrade (bar when I bought faster infantry for which I had to log out-log in to get that +1 range. As said above, I already tried the same thing, with no effect).
Please help.

Prispeval Darth., 12.06.2016 at 08:35

I have just checked your upgrades and it appears 'Expendable Ground Main Defence' has already been added.
Have you tried clearing cookies and the cache also?

Prispeval Sun Tsu, 12.06.2016 at 10:11

Prispeval Darth., 12.06.2016 at 08:35

I have just checked your upgrades and it appears 'Expendable Ground Main Defence' has already been added.
Have you tried clearing cookies and the cache also?

I had, and there was no effect then. Now I logged back in after a couple of hours, and its working fine. Thanks
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