My English is bad, but i'll try to explain. I generated wallet on your site yesterday and I wrote down the seed. When I entered my mnemonic phrase today first time - I immediately came to the contribution page in your site., but account adress was not mine (i dont know why) - It was not 0x5a1d011610b5582a1f51b0afdfb8c94204c96aa1 (wich was showed me when I generated new wallet on you site) - it was 0x00dD6af47AcCAeBc0f70535c306960e1a7a4bBE6 - and i send ETH there. When I entered the mnemonic phrases first time I came to the contribution page immediately (with second account address 0x00dD....bBE6 ). Then I send ETH there. And then I need to enter mnemonic phrases again. I enter it. And then I see "Your single HD mnemonic phrase can access a number of wallets / addresses. Please select the address you would like to interact with at this time. - and there is no account address that was shown to me in your contribution page. But there is the first adress that was generated at first time (0x5a...96aa1) - I can open it, but there is no my ETH there - it is on another adress (0x00d....bBE6) On myEtherWallet i see the same picture. I can't get access to the wallet that was shown to me on your site in "account adress" when I entered mnemonic phrases firstly. Why it was another adress there? Is it a mistake? And how we can fix it? Please help! Thank u very much for the answer.

Hey,
No need to stress. This is browser cache issue.
Try to complete your contribution through MyEtherWallet.
Go to wallet.aeternity.com and follow the contribution process: 1. Select ETH, 2. Use own wallet, 3. Accept terms, 4. Copy the ETH address displayed. Then go to MyEtherWallet and use your 12 word seed to open your wallet and initiate a transaction to the ETH address displayed there.
Regards,
Vlad