The amount you are listed as having donated is shown as a % of your donation max. This max is based on your VIP level and can be changed by increasing it or using the Status Boost perk.
The VIP Status boost (attained through leveling up, being an MVP, or purchasing) will change your donation limit to your boosted VIP level. This will change the % of your limit listed without changing the amount of Coins the other player has received.
For example, let's say your donation limit is 100 Coins, and you donate that to a friend so they now show as having received MAX.
Then, you acquire the Status Boost perk. At your new VIP level, your donation limit is 200 Coins.
You've still donated 100 Coins to your friend, but with your new limit, you could continue to donate more. Therefore the donation bar on your friend will read 50%.
The VIP Status boost (attained through leveling up, being an MVP, or purchasing) will change your donation limit to your boosted VIP level. This will change the % of your limit listed without changing the amount of Coins the other player has received.
For example, let's say your donation limit is 100 Coins, and you donate that to a friend so they now show as having received MAX.
Then, you acquire the Status Boost perk. At your new VIP level, your donation limit is 200 Coins.
You've still donated 100 Coins to your friend, but with your new limit, you could continue to donate more. Therefore the donation bar on your friend will read 50%.